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From: Christoph Hellwig <[email protected]>
To: Jens Axboe <[email protected]>
Cc: [email protected], [email protected]
Subject: Re: [PATCH 1/4] block: add mq_ops->queue_rqs hook
Date: Thu, 16 Dec 2021 01:01:12 -0800	[thread overview]
Message-ID: <YbsAWGcCPn/[email protected]> (raw)
In-Reply-To: <[email protected]>

This whole series seems to miss a linux-block cc..

On Wed, Dec 15, 2021 at 09:24:18AM -0700, Jens Axboe wrote:
> If we have a list of requests in our plug list, send it to the driver in
> one go, if possible. The driver must set mq_ops->queue_rqs() to support
> this, if not the usual one-by-one path is used.
> 
> Signed-off-by: Jens Axboe <[email protected]>
> ---
>  block/blk-mq.c         | 26 +++++++++++++++++++++++---
>  include/linux/blk-mq.h |  8 ++++++++
>  2 files changed, 31 insertions(+), 3 deletions(-)
> 
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index e02e7017db03..f24394cb2004 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -2512,6 +2512,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule)
>  {
>  	struct blk_mq_hw_ctx *this_hctx;
>  	struct blk_mq_ctx *this_ctx;
> +	struct request *rq;
>  	unsigned int depth;
>  	LIST_HEAD(list);
>  
> @@ -2520,7 +2521,28 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule)
>  	plug->rq_count = 0;
>  
>  	if (!plug->multiple_queues && !plug->has_elevator && !from_schedule) {
> +		struct request_queue *q;
> +
> +		rq = rq_list_peek(&plug->mq_list);
> +		q = rq->q;

Nit: I'd just drop the q local variable as it is rather pointless.

Otherwise looks good:

Reviewed-by: Christoph Hellwig <[email protected]>

  reply	other threads:[~2021-12-16  9:01 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-15 16:24 [PATCHSET v3 0/4] Add support for list issue Jens Axboe
2021-12-15 16:24 ` [PATCH 1/4] block: add mq_ops->queue_rqs hook Jens Axboe
2021-12-16  9:01   ` Christoph Hellwig [this message]
2021-12-20 20:36   ` Keith Busch
2021-12-20 20:47     ` Jens Axboe
2021-12-15 16:24 ` [PATCH 2/4] nvme: split command copy into a helper Jens Axboe
2021-12-16  9:01   ` Christoph Hellwig
2021-12-16 12:17   ` Max Gurtovoy
2021-12-15 16:24 ` [PATCH 3/4] nvme: separate command prep and issue Jens Axboe
2021-12-16  9:02   ` Christoph Hellwig
2021-12-15 16:24 ` [PATCH 4/4] nvme: add support for mq_ops->queue_rqs() Jens Axboe
2021-12-15 17:29   ` Keith Busch
2021-12-15 20:27     ` Jens Axboe
2021-12-16  9:08   ` Christoph Hellwig
2021-12-16 13:06     ` Max Gurtovoy
2021-12-16 15:48       ` Jens Axboe
2021-12-16 16:00         ` Max Gurtovoy
2021-12-16 16:05           ` Jens Axboe
2021-12-16 16:19             ` Max Gurtovoy
2021-12-16 16:25               ` Jens Axboe
2021-12-16 16:34                 ` Max Gurtovoy
2021-12-16 16:36                   ` Jens Axboe
2021-12-16 16:57                     ` Max Gurtovoy
2021-12-16 17:16                       ` Jens Axboe
2021-12-19 12:14                         ` Max Gurtovoy
2021-12-19 14:48                           ` Jens Axboe
2021-12-20 10:11                             ` Max Gurtovoy
2021-12-20 14:19                               ` Jens Axboe
2021-12-20 14:25                                 ` Jens Axboe
2021-12-20 15:29                                 ` Max Gurtovoy
2021-12-20 16:34                                   ` Jens Axboe
2021-12-20 18:48                                     ` Max Gurtovoy
2021-12-20 18:58                                       ` Jens Axboe
2021-12-21 10:20                                         ` Max Gurtovoy
2021-12-21 15:23                                           ` Jens Axboe
2021-12-21 15:29                                             ` Max Gurtovoy
2021-12-21 15:33                                               ` Jens Axboe
2021-12-21 16:08                                                 ` Max Gurtovoy
2021-12-16 15:45     ` Jens Axboe
2021-12-16 16:15       ` Christoph Hellwig
2021-12-16 16:27         ` Jens Axboe
2021-12-16 16:30           ` Christoph Hellwig
2021-12-16 16:36             ` Jens Axboe
2021-12-16 13:02   ` Max Gurtovoy
2021-12-16 15:59     ` Jens Axboe
2021-12-16 16:06       ` Max Gurtovoy
2021-12-16 16:09         ` Jens Axboe
  -- strict thread matches above, loose matches on Subject: below --
2021-12-16 16:05 [PATCHSET v4 0/4] Add support for list issue Jens Axboe
2021-12-16 16:05 ` [PATCH 1/4] block: add mq_ops->queue_rqs hook Jens Axboe
2021-12-16 16:38 [PATCHSET v5 0/4] Add support for list issue Jens Axboe
2021-12-16 16:38 ` [PATCH 1/4] block: add mq_ops->queue_rqs hook Jens Axboe

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